Title:
CONTROL DEVICE OF AUTOMATIC TRANSMISSION
Document Type and Number:
Japanese Patent JP2018096518
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a control device of an automatic transmission for suppressing a gear change shock at an upshift.SOLUTION: A controller controls engine torque so as to maintain an engine rotation number at a high rotation number at a torque phase after a start of an upshift, lowers the hydraulic pressure of a release-side clutch at the torque phase, and raises the hydraulic pressure of an engagement-side clutch. When a hydraulic pressure indication value of the release-side clutch reaches a prescribed time at which the indication value is lowered to a value equivalent to a release state (S6), the controller performs engine torque-down control for lowering the engine rotation number to a post-gear change synchronization rotation number after the upshift, and starts an inertia phase (S7). After the controller performs the engine torque-down control, the controller acquires a time change rate of a rotation number difference between the engine rotation number and a pre-gear change synchronization rotation number (S8), when the time change rate is increased, retards a succeeding prescribed time rather than a preceding prescribed time (S10), and when the time change rate not increased, advances the succeeding prescribed time rather than the preceding prescribed time (S11).SELECTED DRAWING: Figure 2
Inventors:
MIZUNO JUNYA
WATANABE HIDEO
MORIYA YUKIHITO
KUMAGAI KUNINORI
WATANABE HIDEO
MORIYA YUKIHITO
KUMAGAI KUNINORI
Application Number:
JP2016244403A
Publication Date:
June 21, 2018
Filing Date:
December 16, 2016
Export Citation:
Assignee:
TOYOTA MOTOR CORP
International Classes:
F16H61/04; B60W10/04; B60W10/06; B60W10/11; B60W10/115; F02D29/00; F16H61/68; F16H61/684; F16H63/50
Attorney, Agent or Firm:
Watanabe strong